Lock and key



J. KOVACH AND TJMARKOVICH.

LQCK AND KEY. APPLICATION FILE D DEC. 17; 1920.

Patented Aug. 22, 19 22.

JOSEPH w. KOVACH nn TONI MABKOVICH, orniiaoaa, MINnEsoTA.

" LOCK AND KEY.

To all i i/710m may concern;

Be it known that we, JOSEPH W. Kovaoir and TONI Manxovrorn' respectively a citizen.

of the United States and subject of the king of Austria both residing at Aurora, in the county of St. Louis and State of Mlnnesota, have invented certain new and useful Improvements in Locks and Keys,jot which the. following is a specification,reference being bad therein-to the accompanying drawlng. 1 i r This invention relates to :a lock and key therefore and has particular reference to a mortise lock such as used in connection with a chest, drawer, trunk and the like, Where the lock is manipulated from'onc side only;

The principal object of the invention is to provide a lock of, this character in which t bolt remains in its locked position until the key is again inserted within the lock for releasing the bolt retaining inechanisin thus preventing any possibility of the bolt being released. from; the locked position by aninstrumentdirectly engaging said bolt.

Another object is to, provide a key for such a lock-,,hav1ng an auxiliary key associated therewith? for releasing the bolt retaining device prior tothefiwithdrawal of the bolt by the key proper. I Y

I Other objects and advantages of the peculiarconstructiont the invent-ion will appear in the further description thereof.

a pletely assembled lock;

In the accompanying. drawings forming part of this application and in which like reference characters indicate like'parts: 1

Figure tie a front elevation of the'com- Figure-2 is a similar elevationiof the-in s de of the lockafter the coverlng plate is removed 1 I Figure 3 is a similar elevation of the op positeside ofthe intermediate plate to that shownin Figure 2', and in'locked position;

Figure 4 is a-similar view to Figure 3 showing the bolt in. unlocked, position 5 Figure 5 is an enlarged front edge elevation of Figure 2;

i-Figure 61s an enlarged verticalsectional view on the line 6-6; Figure 4; Figure is an endelevation of the novel form 01 key,- for. manipulating the lock; and Figure 8 is a side elevation of the key. The supporting members of the lock comprise the base plate 1, the covering-plate 2 and the intermediate plate 3.; they being assembled upon suitable pegs-4:, preferably Specification of Letters Patent. fp figntgd Aug; 22" Application filed December" 17, 1920. "semi No. 431,361; I

rigidlyffixed to the base plate land coop- .erating with suitablescrews 5 for holding the plates in position; the intermediate plate" 3 being spaced approximatelycent'rally between the base and cover plates and so held by suitable spacers around the mediate plate 3 next to the covering plate 1.

and is bifurcated at its 'rearmostend; asat r, and carries a guidinglug-S adjacent the opposite end which extends through a suita ble elongated slot '9 in theintermediate plate; there being a fixed bolt or rivet in 4 the v intermediate plate extending through the bifurcated slot 7'tor guiding the innermost end ofthebolt: The bolt 6 islcut out which issli-ghtly nearer the inner end of the bolt; than the outer end. Directly beneath this cut-awayportion isthe-keyhole- 11, it

its pivotal" connection being. upon thebolt from its lower "edge upwardly forming an 7 v angnlarly shaped recess" 10 therein and? being preferably positioned centrally of the which-extends through the-plate and guides'the bifurcated end of the bolt. This catch is'so positioned as to normally operateby gravity in locking the'bolt, butis also arovided with a small leafispring 14 attached as at 15 with its opposite end fitting into aisiiitahle slot in the-lowerledge of the catch 12- adjacent-its pivotal point and which spring is-so t'ensioned as to assist in keeping the free end of the catch-tin its dc pressed position. 1 1 I Tlie'tre'e-end of theficatch 12jisbifurcated by rectangular Jslot', ,indicated'at 16,-,the up'per'edge otwliich is stepped, as at 17, so that when the bolt 6, is in its extend ed-locked.

position, the-lug 8,- carried thereby an'dprotrading throughthe slot 9, will be engaged in said stepped portion .17 of the catch and thusheld againstibackward movement by the catch having'jdropped into such. position behind the lug Then-it becomes -,impossible 1 a to. retract the boltuntil, the free end of the catch 1,2 is raised, and the mechanism for performing-this operation Willbe described. later when theipeculiar construction of the key is described. 7

However, when the catch is raised to a horizontal position, as shown in Figure 4 of the drawing, the bolt may be freely slid backward, as the lug 8 will pass into the bifurcated slot 16 and assume the position shown in Figure 4. The free end of the bolt 6 protrudes through a suitable opening in the edge of the covering plate 2 of the look, not particularly shown and may engage any form of escutcheon as is common in such locks, the same not being shown.

There is a keyhole 1.1 through the intermediate plate 3 and about the upper portion of which is a circular head 18, the ends of which terminate in the edges of the lower portion of the key hole. The lower portion of the key hole 11 has no offset cutaway portion as has the key hole 19 through the cover plate 2, as this latter key hole may be made of any shape to accommodate the actuating arm of any desired form of key made to cooperate within the cutaway recess 10 of the bolt 6;

Now the key for this particular type of lock comprises a hollow cylindrical shank 20, in which is reciprocally carried the spin: die or shaft 21, terminating in the handle end of the key in a knurled thumb knob 22, this knob occurring inside of the pivotal handle ring 23 of the shank 20. Upon the opposite end of the spindle 21 is fixed a depending actuating L-shaped arm 24 which may be extended beyond the actuating arm 25 which is rigidly fixed to the shank 20 of the key proper or may be withdrawn into said actuating arm, there being a recessed portion and slot 26 within said arm 25 for such purpose and, when the arm 24 is drawn backwardly into the arm 25, the faces of the arms '24 and 25, comprising the end of the key, will be fiush, this interlocking arrange ment of the arms being for the purpose of normally keeping thesame in alignment and from being accidentally damaged.

Assuming that the bolt Got the lock is in its retracted position and it is desired to extend the same to locked position, all that is necessary is to insert the key, when in its closed position,just previously de scribed, into the key hole 19 and rotate the same until the actuating arm 25 has engaged the notch 10 and thrust the bolt 6 forwardly when the lock is locked. As soon as the bolt 6 is thrust forwardly the catch 12 will have dropped'down behind the lug 8 and will securely hold the bolt against being'returi'ied to its retracted position without said catch being first disengaged from the lug. To accomplish this, when such is desired, the key is again inserted within the key hole 19, but not rotated until the spindle 21is thrust forwardly 'by the convenient finger manipulation of the knob 22, when the arm 24"will have passed through the key hole 11, and the arm 24 rotated until brought upwardly against the under edge of the catch 12, where a hole 27, through the plate ing the bolt 6 and returning it to its original position within the look, when reverse manipulation of the spindle 21 will result in its being withdrawn from through the'key hole 11 and permit of key being withdrawn from the look.

When the arm 24 is rotated about in position within the lock it will overlap the bead 18 and thus be kept spaced from the face of the plate 3 to insure positive engagement with the catch 12; and, it is obvious that if a central pin, about which to rotate the key, is desired, as is common in such locks, the same may be employed without constituting any patentable difference in the construction of the lock.

Having thus described our invention, what we claim and desire to secure by Letters Patent, is:

1. The combination with a 'lock of the character described having a reciprocal bolt therein and an automatically operated catch cooperatively engageable with the bolt,oi:' a key therefor composed of an inner and outer telescopic portion both of said portions having bolt engaging arms thereupon, means for operating the inner portion bothlongitudinally and rotatably independently of the engagement the outer portion, and means whereby the bolt engaging arm on the inner member is normally housed within the bolt engaging arm of the outer portion.

2. The combination with a lock of the a character described having a reciprocal bolt therein and an automatically operated catch cooperatively engageable with the bolt, of a key therefor composed of an inner and outer telescopic portion and means for operating the inner portion both longitudinally and nesses.

i 'JOSEPH W. KOVACH. TONI MARKOVIGH;

Witnesses: 1

JoHAN MooLzooM, JOHN VIRANT; I, H i 

